The state’s Division of Labor Standards Enforcement announced the citations against Quetico Monday. The penalties may be the largest the agency has ever assessed against a California warehouse operator, spokesman Peter Melton said.

“You’ll see that labor violations against warehouses has become a theme, but this is a big one,” Melton said.

Quetico did not return phone calls for this article.

In Chino, Quetico operates two warehouses enclosing 500,000 square feet of space in the 5500 block of Schaffer Avenue.